PDF malware analysis — malicious · b91ef3541328a046

MALICIOUS

PDF

50.7 KB Created: 2020-08-30 23:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 64f84d01e18c2836675c4dc2d03f67ef SHA-1: f88920ee1705db07957b5e5e7547252c77347bc9 SHA-256: b91ef3541328a046310d728ade8cabe8892c2c54d13cf9a5c9f21129d10859b8

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded URLs, with one pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, also contains this URL and numerous links to external PDFs hosted on static.usrfiles.com. This suggests a link farm or SEO manipulation tactic, potentially to drive traffic to malicious sites or to obscure the true malicious destination.

Heuristics 3

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://ttraff.cc/wix?keyword=lala+ramswaroop+calendar+december+20
- https://static.usrfiles.com/ugd/b8c837_f8247b8008014c66982ddd0acc608df6.pdf
- https://static.usrfiles.com/ugd/e3ff21_9b1da3c611ee445bbccce82b341ff302.pdf
- https://static.usrfiles.com/ugd/b8c837_3cba53c8fb9c404482634ad67dad745b.pdf
- https://static.usrfiles.com/ugd/0cd3a8_6f9d0db49b294b73964c3157d5b73b3c.pdf
- https://static.usrfiles.com/ugd/d43733_9dda7dce705341d28494a25c9f410176.pdf
- https://static.usrfiles.com/ugd/5de1df_7eae2d85e944458f9e800400746ac417.pdf
- https://static.usrfiles.com/ugd/0bcf16_04969e027f904bf7a7bd3c77bc65f612.pdf
- https://static.usrfiles.com/ugd/b8c837_2fb875fa3d1c47099af43c8358cca095.pdf
- https://static.usrfiles.com/ugd/c3548c_4d03b6a23dd8442bae0d381b34dfb2e7.pdf
- https://static.usrfiles.com/ugd/b8c837_de0d5dda4edb472dba0235540f0ebec8.pdf
- https://static.usrfiles.com/ugd/b8c837_e6a1dd58cfee42ee9a569df62f8afcd9.pdf
- https://cdn.shopify.com/s/files/1/0432/2784/0669/files/pmbok_book_5th_edition.pdf
- https://cdn.shopify.com/s/files/1/0429/0517/4183/files/42075816418.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005ed1.bin` `6b494f41638c9e121bfe05a799b10f4421c40b588a456bab3a19c83cf5ad92ac`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5ED1	5668 bytes
`font_01_sfnt_off00007207.bin` `f747eae70b613a7addfe878d940650e583504124e476350495eb712ecf3e0446`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7207	3024 bytes
`font_02_sfnt_off00007d36.bin` `5a38ee56a94f9626e870262a46d6ecb6266150c933cff5ad2e890a88de2c1c1f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7D36	13716 bytes
`font_03_sfnt_off0000a875.bin` `5d52f40a13f54bcc329d29992e3abd0fd28294c8bc547691d9075fb1d42365f7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA875	16076 bytes

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